The demonstration was set up to highlight the dangers of joining open WiFi networks, where "middle men" could seize data and view activity on the phone while connected without the user's knowledge.
But late on Thursday, security officials in Baghdad banned all cars from the streets until further notice, potentially preventing thousands from reaching the central square where the demonstrations were set to take place.
This series of demonstrations was set off by parliamentary elections on Dec. 4, which were widely condemned as fraudulent.
All week long, a series of "Stroller Jam" demonstrations are set to take place at senators' offices across the country, including one in front of the Capitol Building in Washington, D.C., on Wednesday that will be followed by planned meetings in the Senate.
Meanwhile, 3 demonstration districts were set up - the I.S. 201 Complex in E. Harlem, Two Bridges on the Lower East Side, and Ocean-Hill-Brownsville - each financed by a $50,000 Ford Foundation Grant.
My first talk was in a school so known for demonstrations that last week several classrooms were set on fire.
The East Harlem contract was negotiated under a national demonstration that was set in motion before the permanent program went into effect, with the city's housing finance arm, the Housing Development Corporation, acting as HUD's agent.
With riot police and plainclothes security personnel watching, dozens of lawyers protested in front of the courthouse, calling for two of their colleagues who had been arrested at Tuesday's demonstration to be set free and shouting, "People, people, take to the streets".
The police said they arrested 27 people at unsanctioned demonstrations, including some who were setting off fireworks or sawing through metal barriers.
They have not even admitted officially the existence of one of the covert units, the Special Demonstration Squad which was set up in 1968 and operated for many years.
